Add manifest.json, icons and install button, flatten client/src

client/js/components/ui/Checkbox.js

@@ -0,0 +1,18 @@
+import React from 'react';
+import classnames from 'classnames';
+
+const Checkbox = ({ name, label, topLabel, ...props }) => (
+  <label
+    className={classnames('checkbox', {
+      'top-label': topLabel
+    })}
+    htmlFor={name}
+  >
+    {topLabel && label}
+    <input type="checkbox" id={name} name={name} {...props} />
+    <span />
+    {!topLabel && label}
+  </label>
+);
+
+export default Checkbox;